GPU computing errror of BLAS library

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Rui Xiang 2017-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/369241-gpu-computing-errror-of-blas-library

评论： Joss Knight 2017-11-27

Hi I am using GPU to accelerate my program but an error message comes out after several excuation of my function (I guess this means the first several excuations are successful?)

Failed to initialize GPU BLAS library.

Can anyone help me? I am guess its the CUDA version problem.

Thanks!

I am on Windows 10 with gtx 1080 and CUDA version 9.0.176

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Rui Xiang 2017-11-26

在 MATLAB Online 中打开

Thanks very much for your reply. I installed the latest drivers of graphic card. But it still does not work.

Here is the part of my code using GPU computing. NO matterr I am using parfor or for loop. The first several i (like 1 to 7) the funtions works, but later it just came up with that error message. My cpu is 6 core.

 function H = matrix_DAL1(X,V,A1,A2,par2)
    a2=gpuArray(A2);
    l = size(X,2);
    H = zeros(l,3*par2(2));
 parfor i = 1:l
    i
    U = X{i};
    m=length(U);
    Z = PCA(U);
    dZ = sqrt(Z(:,1).^2+Z(:,2).^2+Z(:,3).^2);
    U = Z/max(dZ)*0.499;
    n = size(V,1);
    Pat1 = zeros(par2(3),n);
    Pat2 = zeros(par2(3),n);
    Pat3 = zeros(par2(3),n);
    for j = 1:n
        [num,dis,ang] = DAL(U,V(j,:)',par2(3));  
        Pat1(:,j) = num/m;
        Pat2(:,j) = num.*dis;
        Pat3(:,j) = ang;
    end
    S11 = 1./(1+exp(-Pat1'*A1));
    s1 = gpuArray(s1);
    S21 = 1./(1+exp(-S11*A2));
    S12 = 1./(1+exp(-Pat2'*A1));
    s2 = gpuArray(s2);
    S22 = 1./(1+exp(-S12*A2));
    S13 = 1./(1+exp(-Pat3'*A1));
    s3 = gpuArray(s3);
    S23 = 1./(1+exp(-S13*A2));
    h = max([S21,S22,S23]);
    H(i,:) = h;
end

Rui Xiang 2017-11-27

在 MATLAB Online 中打开

Oh i’m sorry. I copied wrong code. Here is the right one.

 function H = matrix_DAL1(X,V,A1,A2,par2)
    a2=gpuArray(A2);
    a1=gluArray(A1);
    l = size(X,2);
    H = zeros(l,3*par2(2));
 parfor i = 1:l
    i
    U = X{i};
    m=length(U);
    Z = PCA(U);
    dZ = sqrt(Z(:,1).^2+Z(:,2).^2+Z(:,3).^2);
    U = Z/max(dZ)*0.499;
    n = size(V,1);
    Pat1 = zeros(par2(3),n);
    Pat2 = zeros(par2(3),n);
    Pat3 = zeros(par2(3),n);
    for j = 1:n
        [num,dis,ang] = DAL(U,V(j,:)',par2(3));  
        Pat1(:,j) = num/m;
        Pat2(:,j) = num.*dis;
        Pat3(:,j) = ang;
    end
    S11 = 1./(1+exp(-Pat1'*a1));
    S21 = 1./(1+exp(-S11*a2));
    S12 = 1./(1+exp(-Pat2'*a1));
    S22 = 1./(1+exp(-S12*a2));
    S13 = 1./(1+exp(-Pat3'*a1));
    S23 = 1./(1+exp(-S13*a2));
    h = max([S21,S22,S23]);
    h = gather(h);
    H(i,:) = h;
end

Joss Knight 2017-11-27

Okay, but I still don't have the definition of PCA or DAL or the input variables.

It doesn't look like you're using the GPU till the first line beginning S11. Why don't you separate off that bit of code and see if you can reproduce your problem with just that and some random input matrices? Then I can have a go with it. It might matter what size and type your arrays are.

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